InChI=1S/C24H28N2O7/c1-32-21-13-16(3-7-19(21)28)5-9-23(30)25-12-11-18(27)15-26-24(31)10-6-17-4-8-20(29)22(14-17)33-2/h3-10,13-14,18,27-29H,11-12,15H2,1-2H3,(H,25,30)(H,26,31)/b9-5+,10-6?